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Inventory - Recoverability Schedule of Inventory assets Held for Development, by Reportable Segment (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Dec. 31, 2013 Community | Dec. 31, 2012 Community
Real Estate Properties [Line Items] |  |
Number of Communities on Watch List | 1 | 4
Undiscounted Cash Flow Analysis - Number of Communities | 0 | 4
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV) | $ 0 | $ 15,597
Undiscounted Cash Flow Analysis - Aggregate Undiscounted Cash Flow as a % of BV |  | 114.00%
West Segment |  |
Real Estate Properties [Line Items] |  |
Number of Communities on Watch List | 1 | 0
Undiscounted Cash Flow Analysis - Number of Communities | 0 | 0
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV) | 0 | 0
East Segment |  |
Real Estate Properties [Line Items] |  |
Number of Communities on Watch List | 0 | 3
Undiscounted Cash Flow Analysis - Number of Communities | 0 | 3
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV) | 0 | 9,588
Undiscounted Cash Flow Analysis - Aggregate Undiscounted Cash Flow as a % of BV |  | 107.00%
Southeast Segment |  |
Real Estate Properties [Line Items] |  |
Number of Communities on Watch List | 0 | 1
Undiscounted Cash Flow Analysis - Number of Communities | 0 | 1
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV) | 0 | 5,257
Undiscounted Cash Flow Analysis - Aggregate Undiscounted Cash Flow as a % of BV |  | 128.60%
Unallocated & Other |  |
Real Estate Properties [Line Items] |  |
Number of Communities on Watch List | 0 | 0
Undiscounted Cash Flow Analysis - Number of Communities | 0 | 0
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV) | $ 0 | $ 752

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